stocking



(N0 Model 2 Sheets-Sheet 1.

E. B. STOCKING.

METHOD OF MAKING SATGH-EL BOTTOM BAGS.

Patented Aug. 9, 18 81.

Ira/6771251.-

(No Model.)

2 Sheets-Sheet 2.

E. B. STOCKING.

METHOD OF MAKING'SATGHBL BOTTOM BAGS.

LOM U C P 5 I".

UNITED STATES,

PATENT OFFICE.

EDGAR B. STOCKING, OF WASHINGTON, DISTRICT OF COLUMBIA.

METHOD OF MAKING SATCHEL-BOTTOM BAGS.

SPECIFICATION forming part of Letters Patent No. 245,575, dated August 9, 1881.

(No model.)

To all whom it may concern Be it known that I, EDGAR B. STOCKING, a resident of Washington, District of Columbia, have invented a new and useful Method of Making Satchel-Bottomed Paper Bags, and combinations of mechanism for practicingthat method, of which the following is afull, clear, and exact description, reference being made to the accompanying drawings, making a part hereof.

The objectofmyinvention is to expeditiously and accurately fold or turn downinto their final and finished position the frontand back points of flattened tubular blanks in that state or shape known in the art as the diamond fold, and to accomplish this by simple means.

My method consists in folding the body portion of the blank on such a line asshall cause said body portion to act and serve as a means of folding, laying, or turning over the back point of the diamond fold.

My invention consists in the above method, andin combinations of mechanism for the practice of that method by and,in paper-bag machines.

I proceed to a more particular description of my invention and refer to the accompanying drawings, in which.

Figures 1, 2, 3, 4, 5, and 5" represent a flattened tubularblank in the diamond fold and the subsequent shapes which it is made to assume by my method. Figs. 6 and 7 are illustrations of the means which I employ in practicing my method by machinery.

I take a blank, which by any well-known method or means has been brought to the diamond fold, Fig. 1, and fold the front point on the line 1, Fig. 3, having previously pasted and, if desired, creased it on said line, Fig. 2, the rear point also having been creased on line 2. I then fold the body portion of the blank on any line-say :vthat causes the said body portion to move againstand fold said rear point to its final position in. the finished bag, said line being in rear of and parallel to, but not coincident with, the fold-lineof said back point.

It will be readily seen that, paste having been applied to the rear point, the introduction of a folding-blade on line 2 would be at a greater or less risk of misplacing the folds by the adherence of the blank to the blade, while in my method the rear point is laid down by means not so introduced.

The means employed for practicing my method consist in a rubber-covered feed-roll,

A, located below the bed B of the machine; and running in contact with roll A are rolls 0, and between these and upon their shaft is mounted a pasting and creasing sector, D, which rotates with said rolls 0 in the direction indicated. (See arrow, Fig. 6.) F F are ordinary creasing-blades.

About a bag-length from rolls A O are located an ordinary reciprocating folding-blade, G, and folding-rolls H H, and above the bed of the machine is a simple pressing-roll, I. The pasting mechanism J is of usual construction, and so located that the sector D at each revolution takes paste and deposits it upon a blank. (See a, Fig. 6.)

Difierent rolls, 0, and sectors D, of suitable diameters for each size of bag, may be used in connection with the feed-roll A. After being pasted and creased, the front point, a, strikes against roll I, and is raised up and turnedover, thus folding thepoint on line 1, the roll I pressing the point upon the central part of the diamond, which'may be held down by anysuitable means, this being accomplished while the blank has been advanced by rolls A G such a distance as to bring the line at, Fig. 3, under the blade G, which now descends, carrying the blank into the bite'of the rolls H H, when the blade retreats and the body of the blank is folded on the line 00, and in its passage between rolls H H the portion of said body in rear of line a: is brought against the under side of the rear point, and folds, lays, or turns over and down said point upon the central portion of the diamond, thus completing the bag. At this point the direction of the movement of the rolls H H may be reversed to deliver the bag unfolded on the line 00,- but I prefer a continued movement of the rolls anda complete passage of the blank between them, which delivers the completed bag'in the shape shown at Figs. 5 and 5. The platesK K prevent the central part of the diamond from raising upward at the time the points are folded.

I have shown no gearing connecting the shafts of rolls A O and H H, these being all that are positively driven, nor mechanism for operating the folding-blade G, because such gearing and mechanism are well known and 5 can be applied by any mechanician of ordinary skill.

What I claim is- 1. The method of folding the rear point of a bag-blank in diamond form herein shown and 10 described, which consists in folding the body portion of the blank transversely on a line in rear of the fold-line of the said rear point and toward and against said rear point and the bottom-forming portion of the blank, as set 15 forth.

2. The method of folding the rear point of a bag-blank in diamond form herein shown and described, which consists in creasing said point on its fold-line and folding the body portion of 20 the blank on a line in rear of said creased line of the point and against the point and the bottom-formin g portion of the blank, as set forth. 3. The method of closing a diamond-folded 'blank herein shown and described, which con- 'E. B. STOCKING.

Witnesses:

W. B. MASSON, E. E. MASSON. 

